The Shaft Relative Vibration Monitor is designed to provide extremely high reliability for the most critical rotating machinery in your plant.

This 1-slot monitor is used in conjunction with other AMS 6500 monitors to form a complete API 670 machinery protection monitor.

Applications include steam, gas, compressor and hydraulic turbine machinery.

The main function of the shaft relative vibration monitoring module is to accurately monitor shaft relative vibration and reliably protect machinery by comparing the following parameters

The vibration parameters are compared to alarm setpoints, actuating www.abb-drive.com alarms and relays to reliably protect the machinery.

Shaft relative vibration monitoring consists of a displacement transducer, which can be mounted through the bearing box or inside the bearing housing, targeting the rotating shaft.

The displacement sensor is a non-contact sensor that measures the position and motion of the shaft.

Since the displacement transducer is mounted on the bearing, the monitored parameter is known as shaft relative vibration, i.e. shaft vibration relative to the bearing box.

Shaft relative vibration is an important measurement parameter used for prediction and protection monitoring on all plain bearing machines.

Shaft relative vibration should be selected when the machine housing is large compared to the rotor and the bearing housing does not vibrate between the zero speed of the machine and the production state speed.

Absolute shaft vibration is sometimes selected when the bearing housing and rotor are relatively close in mass, when the bearing housing is more likely to vibrate and affect the relative shaft reading.

The AMS 6500 is an integral part of PlantWeb® and AMS software.

PlantWeb provides a comprehensive view of machine health in conjunction with the Ovation® and DeltaV™ process control systems.

AMS software provides maintenance personnel with advanced predictive and performance diagnostic tools that enable them to confidently and accurately determine machine failures early.

Features:

Dual-channel, 3U-sized, 1-slot plug-in module that cuts cabinet space requirements in half compared to traditional four-channel 6U cards

API 670-compliant hot-swappable modules

Remotely selectable limit multiplication and trip bypass

Pre- and post-buffered and proportional outputs, 0/4-20 mA outputs, 0 – 10 V outputs

Self-test features include monitoring hardware, power inputs, hardware temperature, sensors and cables,

Hardware temperature, sensors and cables

For use with displacement sensors PR6422. PR6423. PR6424. PR6425 and drivers CON 011/91. 021/91. 041/91

Sensor inputs

Number of inputs: two, independent or combined

Monitoring mode

Input types: eddy current, differential

Emerson sensor inputs: Part numbers: 6422. 6423. 6424. 6425

Isolation: Galvanically isolated from power supply

Input resistance: >100 kΩ

Input Voltage Range: 0 to -22 VDC

Input Frequency Range

Lower cut-off frequency 1 or 5 Hz

Upper cut-off frequency 50 – 2000 Hz adjustable